Separating device.



B. H. REDDY. SEPARATING DEVICE. APPLICATION FILED AUG. 23, 1912.

1,1 16,485. Patented ,1914.

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UNITED OFFICE.

BYRON H. REDDY, 0F CLEVELAND, OHIO, ASSIGNOR TO THE W. W. SLY MANUFAC-TUBING COMPANY, OF CLEVELAND, OHIO. A CORPORATION OF OHIO.

SEPARATING DEVICE.

Specification of Letters Patent.

Patented Nov. 10, 1914.

Application filed August 23, 1912. Serial No. 716,629.

To all whom it may concern:

Beit known that l, BYRON H. REDDY, a citizen of the United States,residing at Cleveland, in the county of (-uyahoga and State of ()hio,and useful Improvement in Separating Devices, of which the following isa full. clear,

and exact description, reference being had to the accompanying drawings.

arating granular solids from gases, and particularly to that class ofdevices known as 1 which are used In connec- 5 tion with sand-blastsystems for recovering sand separators,

has been previously used for abrading purposes, but which remains coarseenough for further use. This sand is generally picked up after use andreturned to a higher the sand which rent of air. from which it mustthereafter be separated and deposited in a suitable re ceptacle fromwhich it may be conveniently introduced again into the sand-blastsystem. 'lheldust and fine particles of broken sand should, however. bediscarded so that the good sand will not be clogged or hampered thereby.I

The objects of theinvention are to provide a device of this characterwhich is of simple designvand substantial construction; wherein gravityand inertia contribute to the effectual separation of the sand from theair stream; wherein the aforesaid contributing agencies result naturallyfrom the design of the device and not from the eifect of moving parts orbafiie plates which would he cbjertioimble because of wearing action ofthe sand thereon; wherein an adjustment is provided for the purpose ofcausing the separator to select sand of varying degrees of coarseness;and generally to produce a device whereby particles above a certainweight and size will be collected and particles of smaller weight andsize rejected with rapidity and certainty. I

With these objects in view, the invention may be defined as consistinggenerally of the combination of elements set forth in the claims annexedhereto and illustrated in the drawings accom 'mnymg and formhaveinvented a certain new This invention relates to devices for sep levelby means of a curj my invention; Fig. i is a horizontal see- 'i tiontaken substantially on line 2-2 of Fig. 1, and Fig. 3 is a View, similarto Fig. 1, of l a modified form of my invention. Describing the parts byreference characters, 1 represents the casing 01' shell of the devicewhich is, preferably of substantially rectangular form and has its lowerportion converging toward the bottom as at 2 where is communicates withan outlet 1 spout An air conduit communicates with the interior of thiscasing at a point 1 near the top of one of its upright walls, theportion of the conduit nearest the casing being preferably disposedsubstantially hori' zontal as shown at The body of this conduit isusually located in an upright pol sition from the fact that the objectof the 3 air stream is to elevate the sand from the foundry ioor orscouring room so as to deliver it a second time to the'air-blast nozzleor other device and permit it to be used i again. although theparticular mode of inlstallation will depend upon the arrangement of theplant. It is merely essential i that this conduit be formed with thesmalli est possible number of bends and that what i bends are necessarybe made with wide radius as indicated at 6 so as to prevent theformation of eddies and the consequent deposition of the sand. The otherside wall of the casing is preferably formed with an j elongatedhorizontal port 7 which communicates with the mouth 8 of a suctionconduit 9, which suction conduit communicates with an exhaust fan (notshown) j wherebya current of air is induced in the {whole system. Theport 7 preferably ex- 1 tends substantially the full width of the casjing as shown in Fig. 2 so that the air stream is expanded within thecasing and its velocity decreased, thereby lessening its carrying power.Mounted within the casing above the mouth of the conduit 4 is adownwardly l curved deflecting plate 10 whereby the incoming air andsand is deflected toward the l bottom of the casing as shown by thecurved arrows. Pii'oted upon an axis 11 adjacent to the farther side ofthe casing is a septum j plate 12 having at its forward edge an upiturned portion 13 which, together with the l edge of the plate 10,defines an upwardly extending passageway through which the air must passto reach the port 7. The plate 12 preferably extends from one end of thecasing to the other as shown in Fig. 2 and its rearward edge isdownturned as at 14 and lies closely adjacent to the casing wall so asto prevent any great amount of air from passing therebetween. In theembodiment illustrated in Fig. 1 this lip H lies adjacent to theslanting bottom 2 of the casing, but it is obvious that the particularshape of the casing wall at this point is entirely a matter of design.

A rock sha ft 15 traverses the upper part of the casing above the plate12 and is journaled in the end walls thereof as shown at 16. This shaftcarries an arm 17 adjacent to each of the ends of the casing and to theend of each of these arms is articulated a link 18 the opposite end ofwhich is pivoted to the plate 12. The projecting end 7 of this shaft isprovided with a handle 19 -space through which it passes.

cooperating with a sector 20 or like device whereby it may be secured inposition and the inclination of the plate 12 fixed.

Carried by the top of the casing above the plate 12 is a seconddeflecting plate 21 also curved downwardly similar to the plate 10. Theplate 21 preferably extends from end to end of the casing andis-suitably slotted at its ends for the passage of the links 18. .Thefree edge of the plate 21 extends downwardly below the level of theoutlet port 7 a sufficient distance to necessitate an abrupt change inthe direction of the air stream.

The operation of the device is as follows: Sand-laden air delivered tothe casing by Way of the conduit 4 is first thrown down wardly by theplate 10 so as to be pocketed in the space beneath the plate 12. Fromthis pocket it escapes in an upward direction through the longpassageway defined by the edge of the plate 10 and the side of theupturned portion 13. The greater inertia of the sand, together with itsgreater weight causes it to be thrown downwardly out of the air streamand to lodge in the lower portion of the casing, this result being alsoaided by the decrease in the velocity in the air caused by the increasein the area of the The air which passes around the edge of the portion13 is deflected downwardly a second time by,

the plate 21 after which it is forced to swerve upwardly again in orderto pass through the outlet port 7. By this time its velocity will havebecome much diminished and the vertical dimension of the moving portionof the air stream will have become very small. For both these reasonsits carrying power will be greatly diminished, and more sand will bedropped upon the upper surface of the plate 12. This sand will flowdownwardly along the inclined side of this plate and be dischargedthrough the narrow slot between the lip ll and the casing wall. The airwhich passes through the port 7 will carry nothing but dust, al thoughthe fineness of this dust can be regulated by adjusting the inclinationof the plate 12, since the greater the elevation of this plate, the moreabrupt will be the turning of the air stream in the first chamber of thecasing and the greater the decrease in speed and carrying power of theair.

In Fig. 3 I have illustrated my improved separator as formed with adouble inlet so as to accommodate two conduits at one time. In thismodification the casing 1 inlets P, 1*, defiectin plates 10 10, 12 12,and 21., 21 are t e same as before. The lips 14*, ll of'the plates 1212*, instead of being disposed adjacent to a Wall of the casing, aredisposed adjacent to each other so as to define therebetween a narrowslit for the discharge of the finer sand which is deposited upon theupper surface of these plates. The outlet 7 is found located at the topof the casing between the plates 12, 12.

It will be seen that this device is entirely ree from moving parts orfrom any fixed parts or plates against which the stream of air and sandcan impinge directly. Such arrangements have been tried but areobjectionable because of the wearing action of the sand thereon. Thedeflecting plates employed in this device are arranged so that the airstream will strike them substantially tangentially so as to have itsdirection changed gradually and with a minimum of wear. These plates areso disposed with reference to each other that several abrupt changes inthe direction of the air stream may take place in a downward di-'rection and in the open space in the interior of the casing so that thesand may be thrown out of the air stream without dan er of abrading anypart of the separator. 11 fact the bottom part of the casing and the topof the plate 12 will generally be covered with a layer of the sandalready deposited which will receive the newly separated sand withoutany wear whatever.

Although I have described my invention as adapted particularly for theseparation of granular abrasive material such as sand from a stream ofair and although the device as illustrated is particularly useful forthis purpose owing to the arrangement whereby erosion of the parts isavoided, it will be obvious that it can be employed with good resultsfor separating grain, sawdust and shavings, or any such material from astream of moving air.

While I have necessarily described my invention in detail and pointedout at length the features of construction of the preferred embodimentthereof, it will be obvious that these details may be varied solidsbeing in the lower portion thereof, of

' v a deflecting plate within said casing and rooting the inflowingstream away from said said casing and 1 arranged more horizontal thanotherwise I and located between said solids outlet and said gas outletand having its forward edge spaced from said inlet. and means for di- 1l deflectingplatc, said means defining in coni junction with saiddeflecting plate a narrow elongated passageway, such passageway beingdisposed at a point removed from the course of said inflowing streamwhereby the direction of flow of the gases will be changed abruptlvwithout causing the granular solids to impinge upon said plate.

2. In a device for separating granular. sohds from a moving i a gasstream, the combination, with a casing having substantially verticalwalls, one of said walls having an inlet and the opposite wall anoutlet, of a cur ed deflecting plate within said casing and locatedabove said inlet and adapted to change gradually the course of theinflowing stream and direct it toward the lower part l of said casing, asecond deflecting plate within said casing between said inlet and 1 saidoutlet and located above and at one side i of and out of the directionof such infiowing stream, said second deflecting plate extendl ing intoclose proximity with but spaced from the side of the casing o posite tosaid first deflecting plate and wit the ends of having its edge nearestto said first deflecting plate spaced therefrom and from the top of thecasing to define an elongated upwardly opening passageway.

3. ln a separating device for heavy granul ar particles mixed with air,the combination, with a casing having at one side an inlet opening formixed air and granular par-- ticles and at the other side a horizontallyelongated. vertically narrowed outlet open- E ing, of means fordeflecting downwardly'the i inflowing stream. a septum plate projectingl 'ng opposite said trom the side of the casi inlet and overlying thebottom of the casing so as to define a chamber, the forward edge of saidseptum plate being substantially horizontal and spaced from the inletside of l the casing, so as to define an upwardly opening elongatedpassageway extending from 5 end to end of the casing, a

1 running from end to deflecting flange 1 solids from carried by theforward edge of said septum plate and extending upwardly to a point adjaccnt to the top of the casing, and a second deflecting plate carriedby the casing and overlying said septum plate, and having its lower edgelocated below the plane including the edge of said flange and the edgeof the outlet opening.

4. In a separating device for heavy ran ular particles mixed with air,the com ination, with a casing having at one side an inlet opening formixed air and granular particles and at the opposite side a horizontallyelongated outlet opening, the lower portion oi said casing being formedwith a sand receptacle. ol" a curved deflecting plate within said casingand lccated above said inlet and adapted to change gradually the courseof the inflowing stream and direct it toward the lower part of saidcasing, an inclined septum plate in said casing, and end thereof, theupper edge of said septum plate'bcinglocated adjacent to and above theedge of said deflecting plate and spaced therefrom to define apassageway for gas, the opposite edge of said septum plate being locatedadjacent to the opposite side of the casing, and spaced therefrom ashort distance so as to define a comparatively narrow discharge openingfor granular material, and a deflecting plate mounted above said septumplate and adapted to direct downwardly the air flowing through saidpassageway. the edge of said. second deflecting plate being disposedlower than the plane including the uppermost edge of said septum plateand a side of said outlet opening.

In a separating device for heavy annlar abrasive particles mixed withair, the combination, with a casing having at one side an inlet openingfor mixed air and granular particles and at the opposite side an outletopening, the lower portion of said casing being formed as a sandreceptacle, of means for directing the inflowing stream downwardlytoward the lower part of said casing, a septum plate within said casingand overhangmg said sand receptacle, said septum plate extending from apoint beneath said outlet opening to a point adjacent to said directingmeans, whereby the air stream will be directed sharply upwardly andconducting the same to the upper part of the casing, means fordeflecting said air stream successively downwardly and upwardly afterits passage by the edge of said septum plate, and means for conveyingthe granular particles deposited from the air stream upon said septumplate directly to the lower portion of the casing without permittin thedirect passage of air in the opposite direction.

6. In a device for separating granular gases, the combination with a.

horizontally elongated outlet opening, of :1 depending deflecting latemounted in said casing between the in ct and the outlet, the lower edgeof said plate being substantially horizontal and spaced from all partsof the casing and the remaining edges of said plate being connected tothe casing wallsso as to prevent the passage of gas therearound, a

1 septum late interposed between the edge of septum plate interposedbetween said outlet said do cctin plate and said outlet, said and thelower portion of said casing and I l septum plate saving at its forwardedge a running substantially from end to end theresubstantially verticalupturned portion of, the portion of said septum plate adjacent I closedcasin having an inlet and an outlet, said inlet being substantiallyhorizontal and facing said outlet, and the lower portion of said casingbeing formed as a receptacle for granular material, of a conduit formixed granular solids and gases communicating with said inlet, adeflecting plate adjacent to said inlet and adapted to divert downwardlythe gases and solids entering therethrough, a

whose upper edge is spaced from the top of to said deflecting platebeing turned upthe casing to form a passageway, the rewardly and spacedfrom said deflecting plate maining edges of said septum plate disposedto define an elongated passageway for said closely adjacent to the wallsof the casing gases, a second deflecting plate mounted in so as toprevent any material flow of gas said casing at the opposite side ofsaid septhercaround, and means for varying the tum plate from said firstdeflecting plate and height of the forward edge of said septum adaptedto divert downwardly the gases plate so as to vary the width anddirection passing through said passageway, the edge of said passageway.I of said second deflecting plate being dis- 9. In a device forseparating granular posed below the outlet opening, and means solidsfrom a moving gas stream, the combifor conveying to the lower portion ofsaid nation, with a casing having an inlet and an casing the granularmaterial deposited on outlet located at spaced points of its upper theupper surface of said septum plate withportion anda conduit for mixedgranular out permitting any material flow of gas. solids and gasescommunicating with said '7. In a device for separating granular inlet,there being an outlet for ranular solids from gases, the combinationwith a solids formed in the lower part of said chamsubstantially closedcasing having therein ber, of a plurality of depending deflecting aninclined septum plate whereby the same plates located within said casingbetween is divided into lower and upper compartsaid inlet and saidoutlet and having free, ments, the upper edge of said septum platesubstantially horizontal lower edges, the rebeing substantiallyhorizontal and defining maining edges of said deflecting plates exanelongated passageway for gases, and the tending into close proximitywith the walls remaining edges of said plate being so 10- and top of thecasing so as to prevent any rated with reference to the parts of thematerial flow of gas therearound, a septum separator as to prevent thepassage of any plate located between the top and bottom of materialamount of gas thereby, the side said casing and dividing the same intoupper wall of said casing ad acent to the free edge and lowercompartments, said septum plate of said septum plate being formed withan having its forward edge upturned and inter inlet opening for mixedgranular solids and posed between a pair of said first plates to gases,means for deflecting downwardly into fornra narrow, elongated, tortuouspassagethe lower chamber the gases and solids enterway, the oppositeedge of said septum plate ing through said inlet, the portion of theextending to a point adjacent said outlet and chamber above said septumplate being in the side edges extending into close proximitycommunication with a horizontally extendwith the walls of the casing soas to prevent ing elongated outlet, and means in such any material flowof gas therearound and upper chamber for deflecting downwardly means forvarying the height of the forthe air stream passing therethrough, saidward edge of said septum plate so as to vary deflecting plate beingarranged between the free edge of said septum plate and said outlet.

8. In a device for separating granular solids from gases, thecombination, with a casing having at one side an inletopening for mixedair and granular particles and at a point removed from said inletopening a 1 Iii testimony whereof, I hereunto afiix my signature in thepresence-of two witnesses. BYRON H. REDDY. Witnesses HAROLD S. SMITH,Bunxxim B. lVEs'r.

the width and tortuousness of said passage-

